Automata Theory
Topics
Properties of Regular
Languages
1)
How to prove whether a given
language is regular or not?
2)
Closure properties of regular
languages
3)
Minimization of DFAs
1
2
Some languages are not
regular
How to prove languages are
not regular

Automata Theory
Context-Free Languages &
Grammars
(CFLs & CFGs)
Not all languages are regular
So what happens to the languages
which are not regular?
Can we still come up with a language
recognizer?
i.e., something that will accept (or reject)
strings tha

Automata Theory
Turing Machines are
Turing Machines
Very powerful (abstract) machines that
could simulate any modern day
computer (although very, very slowly!)
For every input,
answer YES or NO
Why design such a machine?
1
A Turing Machine (TM)
B B B X1 X

Automata Theory
Decidability vs. Undecidability
There are two types of TMs (based on halting):
(Recursive)
TMs that always halt, no matter accepting or nonaccepting DECIDABLE PROBLEMS
(Recursively enumerable)
TMs that are guaranteed to halt only on accept

At a theatre audition, candidates are assessed on acting an excerpt of a play. The probability that a candidate
encounters a loss of memory while acting depends on the time they spent learning and rehearsing it. In particular,
0 Let L be the event L=cfw_t

Engineering Materials and Engg Engineering
Materials and Metallurgy
The Technical University Of Kenya
B.Eng. Aeronautical Engineering
METALLIC MATERIALS
Production of iron and steel
The terms iron, cast iron and steel in reference to a metal in which the

AIRCRAFT MAINTENANCE
METHODS
Presented
By
Colonel Enos Ndoli, BSc(Hons)
Chartered Aeronautical Engineer
Cabin Environmental
Control Systems (ECS)
The mixture of gases that make up the
earths atmosphere is commonly called
air. It is composed principally of

AIRCRAFT AEROELASTIC
DESIGN AND ANALYSIS
An introduction to fundamental concepts of static and dynamic aeroelasticity with simple idealized models and mathematics to describe the essential
features of aeroelastic problems. These notes are intended for the

5. Calculation of Natural Frequencies and Modes using Energy Methods
In the preceding chapter, we discussed the standard method of finding natural frequencies
and modes of continuous systems by solving the governing partial differential equation of
motion

Elementary Tutorial
Fundamentals of Linear
Vibrations
Dr. An Tran
in collaboration with
Professor P. R. Heyliger
Prepared by
Department of Civil Engineering
Colorado State University
Fort Collins, Colorado
June 2003
Developed as part of the Research Exper

Aeroelasticity
Lecture 3:
Unsteady Aerodynamics
Theodorsen
G. Dimitriadis
Introduction to Aeroelasticity
Unsteady Aerodynamics
! As mentioned in the first lecture, quasi-steady
aerodynamics ignores the effect of the wake
on the flow around the airfoil
!

Aeroelasticity
Lecture 7:
Supersonic Aeroelasticity
G. Dimitriadis
Introduction to Aeroelasticity
Introduction
A All the material presented up to now
concerned incompressible flow.
A In this lecture we will present a simple
treatment of 2D supersonic flow

Aeroelasticity
Lecture 5:
Three-Dimensional Wings
G. Dimitriadis
Introduction to Aeroelasticity
Wings are 3D
E All the methods described until now
concern 2D wing sections
E These results must now be extended to
3D wings because all wings are 3D
E There a

Aeroelasticity
Lecture 4:
Theodorsen for non-sinusoidal
motion
G. Dimitriadis
Introduction to Aeroelasticity
Time domain responses
@ Theodorsen analysis requires that the
equations of motion are only valid at zero
airspeed or at the flutter condition.
@ T